<?php

/**
* Hoa
*
*
* @license
*
* New BSD License
*
* Copyright © 2007-2017, Hoa community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Hoa nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

namespace Hoa\Iterator\Test\Unit;

use Hoa\Iterator as LUT;
use Hoa\Test;

/**
* Class \Hoa\Iterator\Test\Unit\Lookbehind.
*
* Test suite of the look behind iterator.
*
* @copyright Copyright © 2007-2017 Hoa community
* @license New BSD License
*/
class Lookbehind extends Test\Unit\Suite
{
public function case_traverse()
{
$this
->given(
$iterator = new LUT\Map(['a', 'b', 'c']),
$lookbehind = new LUT\Lookbehind($iterator)
)
->when($result = iterator_to_array($iterator))
->then
->array($result)
->isEqualTo(['a', 'b', 'c']);
}

public function case_check_behind()
{
$this
->given(
$iterator = new LUT\Map(['a', 'b', 'c']),
$lookbehind = new LUT\Lookbehind($iterator)
)
->when(
$lookbehind->rewind(),
$key = $lookbehind->key(),
$current = $lookbehind->current(),
$hasPrevious = $lookbehind->hasPrevious(),
$previous = $lookbehind->getPrevious()
)
->then
->integer($key)
->isEqualTo(0)
->string($current)
->isEqualTo('a')
->boolean($hasPrevious)
->isFalse()
->variable($previous)
->isNull()

->when(
$lookbehind->next(),
$key = $lookbehind->key(),
$current = $lookbehind->current(),
$hasPrevious = $lookbehind->hasPrevious(),
$previous = $lookbehind->getPrevious()
)
->then
->integer($key)
->isEqualTo(1)
->string($current)
->isEqualTo('b')
->boolean($hasPrevious)
->isTrue()
->string($previous)
->isEqualTo('a')

->when(
$lookbehind->next(),
$key = $lookbehind->key(),
$current = $lookbehind->current(),
$hasPrevious = $lookbehind->hasPrevious(),
$previous = $lookbehind->getPrevious()
)
->then
->integer($key)
->isEqualTo(2)
->string($current)
->isEqualTo('c')
->boolean($hasPrevious)
->isTrue()
->string($previous)
->isEqualTo('b');
}

public function case_double_rewind()
{
$this
->given(
$iterator = new LUT\Map(['a', 'b', 'c']),
$lookbehind = new LUT\Lookbehind($iterator)
)
->when(
$lookbehind->rewind(),
$key = $lookbehind->key(),
$current = $lookbehind->current(),
$hasPrevious = $lookbehind->hasPrevious()
)
->then
->integer($key)
->isEqualTo(0)
->string($current)
->isEqualTo('a')
->boolean($hasPrevious)
->isFalse()

->when(
$lookbehind->rewind(),
$key = $lookbehind->key(),
$current = $lookbehind->current(),
$hasPrevious = $lookbehind->hasPrevious()
)
->then
->integer($key)
->isEqualTo(0)
->string($current)
->isEqualTo('a')
->boolean($hasPrevious)
->isFalse();
}

public function case_empty()
{
$this
->given(
$iterator = new LUT\Mock(),
$lookbehind = new LUT\Lookbehind($iterator)
)
->when(
$lookbehind->rewind(),
$valid = $lookbehind->valid()
)
->then
->boolean($valid)
->isFalse();
}
}